Science : Ch 11 – The Human Eye and the Colourful World

This test is designed based on NCERT Syllabus for Class 10 Topics : The Human Eye and the Colourful World

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

At noon, the Sun looks white as:

light is least scattered

all the colours of the white light are scattered away

blue colour is scattered the most

red colour is scattered the most

2 / 15

A clear sky appears blue, because:

blue light gets absorbed in the atmosphere

ultraviolet radiations are absorbed in the atmosphere

violet and blue lights get scattered more than the lights of all other colours by the atmosphere

lights of all other colours is scattered more than the violet and blue colour lights by the atmosphere

3 / 15

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

is parallel to the incident ray.

is along the same direction of incident ray

gets deviated and bends towards the thinner part of the prism.

gets deviated and bends towards the thicker part (base) of the prism.

4 / 15

The red colour of the sun at the time of sunrise and sunset is because:

red colour is least scattered

blue colour is least scattered

red colour is most scattered

blue colour is most scattered

5 / 15

Why don’t planets twinkle?

Intensity of light entering our eye is infinity

Intensity of light entering our eye is one.

Intensity of light entering our eye is zero.

Intensity of light entering our eye is two.

6 / 15

The splitting of light into its component colours is called

Dispersion of light

Scattering of light

Refraction of light

Reflection of light

7 / 15

The sky appears black to an astronaut

Because there is no refraction

Because there is no reflection

Because there is no scattering light

none

8 / 15

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

Atmospheric refraction

Refraction of light

Atmospheric Reflection

None

9 / 15

The defect in a person can see nearby objects but not far away objects

Far-sightedness

Myopia

Astigmatism

none

10 / 15

Lenses which have both concave and convex structure.

Bifocal lenses

Concave lenses

Difocal lenses

Convex lenses

11 / 15

Myopia can be corrected by using

convex lens

concave lenses

both concave and convex

none

12 / 15

The SI unit of Power of a lens is

Hertz

Dipotre

newton

none

13 / 15

The emergent ray in a prism bend at an angle to the direction of the

incident ray

refracting ray

reflecting ray

none

14 / 15

Visible spectrum is the band of coloured components of a

red light beam

white light beam

blue light beam

black light beam

15 / 15

The refractive index of glass is least for

violet color

red color

blue color

white color

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Science : Ch 11 – The Human Eye and the Colourful World

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